Improvement in cutter-heads



Patented June 20,1876.

WITNESSES 2 Sheets-Sheet 2. P. G. FINN.

- CUTTER-HEAD. Na.'178,918. Patented.J'un e 20.1876.

INVEAITDR N. PETERS. FNOTD-UTNOGRAPHER. WASHINGTON. D C.

NI'IED STATES PATENT PHILANDER Gr. FINN, OF ERIE, PENNSYLVANIA.

IMPROVE MENT IN CUTTER-HEADS.

To all whom it may concern:

Be it known that I, PHILANDER G. FINN, of Erie, in the county of Erie, and State of Pennsylvania, have invented certain new and useful Improvements in Gutter-Heads and I do hereby declare .that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to cutter-heads for what are known as sticking and matching machines; and, consists in, first, the form of the head; and, second, the form of the knives and their mode of attachment and adjustment; and third, in the relation of the two parts above-named to each other.

My device is shown in the accompanying drawing as follows:

Figure 1 is a plan view of my cutter-head. Fig. 2 is a plan view of. a detached knife. Figs. 3 and 4 are transverse-section views of tonguing and grooving knives. Fig. 5 is a vertical section of the head, taken longitudinally through the hub. The head here shown is adouble head, and has attached knives for cutting moldings. Fig. 6 is a section of a molding-knife. The shape of the cutting part of the knife makes no difierence, as the body is the same in all cases. So, while I have shown various forms of knives, and the manner in,which they may be arranged with relation to each other, one letter of reference, A, is used to designate a knife, no matter what its shape may be. I p

The knives shown in Figs. 1 and 3 are grooving-knives, and those shown in Figs. 2 and 4 are tonguing-knives;',while, as before stated, those shown in Figs. 5 and 6 are for cutting moldings. The disk to which the knives are attached is marked a. The hub is lettered. c, and the adjusting set-screws are lettered d and d. In these last-named parts there is in my device nothing new. The knives A are made circularth'at is, the body of the knife has its front or outer and its inner faces made concentric, (see Fig. 2,) and the upper and lower faces of the body are flat. (See Figs. 3, 4, and 6.) Each knife application filed has a concentric slot, 0, extending nearly its entire length, through which passes the attaching screw-bolt f, by which the knives are firmly securedto the disk at. The inner faces of the knives set against eccentric projections from the hub. These are lettered b b b. The curve of these projections is concentric with thecurve of the knives, and hence their faces and the adjoining faces of the knives present a continuous bearing; and as the knives wear away, as seen by dotted lines in Fig. 2 at t t, the cutting-point can be at as great a distance from the center of the head as when the knives are new, by pushing the knives upon the eccentric projections 11 I). From these dotted lines it will be seen that the knives can be used until nearly the'whole cuttingeccentrically to the same, no part of the knife.

but the cutting-point can touch or come in contact withthe board; hence there will be no friction along the cutter, and yet the action of the cutters on the wood is like that of a plane-bit in an ordinary hand-plane.

. As I have before stated, I have shown various forms of the cutting part of the knives;

but it will be observed in all of them that the shank of the knife is always the same, and is always placed at right angles to the plane of motion of the cutter, and attached to the disk at by set-screws or screw-bolts passing through theconcentric slots 0.

In Fig. 5 I have shown how my head may be made double, and carry on one side. knives for cutting certain members of a molding, and on the otherside certain other parts of the molding. The section-a1 line in this figure I passes very near the cutter-point of the knives on the left side of the head 5 and hence through the highest part of the eccentric projections b while it passes through the lowest part of said projections, and hence the lowest part of the knives 0n the right side 5 for when double rrroie.

shank, which, when the knife is attached to the head, is parallel to the face of the eccentrics, against which the knife rests.

In testimony that I claim the foregoing as my' own Iafiix niy signature in presence of two witnesses.

PHILANDER G. FINN.

Witnesses:

JOHN J. READ, JNO. K. HALLOGK. 

